text: /* Cancellable system call stubs.  Linux/PowerPC version.
     Copyright (C) 2003-2017 Free Software Foundation, Inc.
     This file is part of the GNU C Library.
     Contributed by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>, 2003.
  
     The GNU C Library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.
  
     The GNU C Library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public
     License along with the GNU C Library; if not, see
     <http://www.gnu.org/licenses/>.  */
  
  #include <sysdep.h>
  #include <tls.h>
  #ifndef __ASSEMBLER__
  # include <nptl/pthreadP.h>
  #endif
  
  #if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
  
  # undef PSEUDO
  # define PSEUDO(name, syscall_name, args)				\
    .section ".text";							\
    ENTRY (name)								\
      SINGLE_THREAD_P;							\
      bne- .Lpseudo_cancel;						\
    .type __##syscall_name##_nocancel,@function;				\
    .globl __##syscall_name##_nocancel;					\
    __##syscall_name##_nocancel:						\
      DO_CALL (SYS_ify (syscall_name));					\
      PSEUDO_RET;								\
    .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel;	\
    .Lpseudo_cancel:							\
      stwu 1,-48(1);							\
      cfi_adjust_cfa_offset (48);						\
      mflr 9;								\
      stw 9,52(1);							\
      cfi_offset (lr, 4);							\
      DOCARGS_##args;	/* save syscall args around CENABLE.  */	\
      CENABLE;								\
      stw 3,16(1);	/* store CENABLE return value (MASK).  */	\
      UNDOCARGS_##args;	/* restore syscall args.  */			\
      DO_CALL (SYS_ify (syscall_name));					\
      mfcr 0;		/* save CR/R3 around CDISABLE.  */		\
      stw 3,8(1);								\
      stw 0,12(1);							\
      lwz 3,16(1);	/* pass MASK to CDISABLE.  */			\
      CDISABLE;								\
      lwz 4,52(1);							\
      lwz 0,12(1);	/* restore CR/R3. */				\
      lwz 3,8(1);								\
      mtlr 4;								\
      mtcr 0;								\
      addi 1,1,48;
  
  # define DOCARGS_0
  # define UNDOCARGS_0
  
  # define DOCARGS_1	stw 3,20(1); DOCARGS_0
  # define UNDOCARGS_1	lwz 3,20(1); UNDOCARGS_0
  
  # define DOCARGS_2	stw 4,24(1); DOCARGS_1
  # define UNDOCARGS_2	lwz 4,24(1); UNDOCARGS_1
  
  # define DOCARGS_3	stw 5,28(1); DOCARGS_2
  # define UNDOCARGS_3	lwz 5,28(1); UNDOCARGS_2
  
  # define DOCARGS_4	stw 6,32(1); DOCARGS_3
  # define UNDOCARGS_4	lwz 6,32(1); UNDOCARGS_3
  
  # define DOCARGS_5	stw 7,36(1); DOCARGS_4
  # define UNDOCARGS_5	lwz 7,36(1); UNDOCARGS_4
  
  # define DOCARGS_6	stw 8,40(1); DOCARGS_5
  # define UNDOCARGS_6	lwz 8,40(1); UNDOCARGS_5
  
  # if IS_IN (libpthread)
  #  define CENABLE	bl __pthread_enable_asynccancel@local
  #  define CDISABLE	bl __pthread_disable_asynccancel@local
  # elif IS_IN (libc)
  #  define CENABLE	bl __libc_enable_asynccancel@local
  #  define CDISABLE	bl __libc_disable_asynccancel@local
  # elif IS_IN (librt)
  #  define CENABLE	bl __librt_enable_asynccancel@local
  #  define CDISABLE	bl __librt_disable_asynccancel@local
  # else
  #  error Unsupported library
  # endif
  
  # ifndef __ASSEMBLER__
  #  define SINGLE_THREAD_P						\
    __builtin_expect (THREAD_GETMEM (THREAD_SELF,				\
  				   header.multiple_threads) == 0, 1)
  # else
  #  define SINGLE_THREAD_P						\
    lwz 10,MULTIPLE_THREADS_OFFSET(2);					\
    cmpwi 10,0
  # endif
  
  #elif !defined __ASSEMBLER__
  
  # define SINGLE_THREAD_P (1)
  # define NO_CANCELLATION 1
  
  #endif
  
  #ifndef __ASSEMBLER__
  # define RTLD_SINGLE_THREAD_P \
    __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
  				   header.multiple_threads) == 0, 1)
  #endif
  